A wide-angle spin filter based on graphene with Rashba coupling and exchange field

Spin precession formula is deduced in graphene with Rashba spin-orbit coupling (RSOC) and exchange field, which can control accurately the transmission of up-spin and down-spin electrons. And a wide-angle spin filter can be achieved by the combined effects of exchange field and RSOC. Further spin polarization can be observed, which increases with increasing RSOC or exchange field.

A wide-angle spin filter can be achieved in graphene-based nanostructure with spatially modulated RSOC and exchange field.Figure optionsDownload as PowerPoint slideHighlights
► Spin precession formula is deduced in graphene with the RSOC and exchange field.
► Wide-angle spin filter and spin convert can be achieved.
► Positive and negative spin polarization can be achieved.
► Spin polarization increases with increasing the RSOC or exchange field.